Question about 1989 Jeep Wrangler

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Vacuum diagram 89 jeep wrangler

The only diagrams I can find do not provide enough detail. Chilton and Haynes manual both have poor quality diagrams. Any help would be appreciated.

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  • awtexas Apr 24, 2009

    I think I have deciphered some of the diagrams from the internet which are very close to chilton & haynes. The problem I am having is that some things have been disabled by the previous owner and some lines ar routed to different places. Thanks for your response.

  • yadayada
    yadayada May 11, 2010

    Factory manuals give exact locations and are at least 95% correct, I have only worked for new car dealers, 7 diff lines of cars.

  • Richard Scordino May 11, 2010

    The routing shown in diagrams is fairly accurate, however, as in all diagrams, (vacuum or electrical) what the diagrams don't give you is the location of each component. After many years of reading diagrams, this is the one item I wish someone would add to just about every manual . Even a good tech does not know the location of these items on every car..(especially when working in a general repair shop where multiple makes years and models are the norm not the exception).and the manufacturers change the location about as often as I change my socks! Both manuals you have are fairly decent but you need to be careful reading them.


  • yadayada
    yadayada May 11, 2010

    You may be able to find a Factory manual on ebay used, also smog inspection stations have special emission diagnosis manuals printed by chilton and haynes that will have the vacuum hose info u need.

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Fig. 1: Emission control vacuum schematic-1987-90 with 4.2L engine and automatic transmission

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Fig. 2: Emission control vacuum schematic-1987-90 with 4.2L engine and manual transmission

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